Here's a “CAMP” sign I made, requested by someone.
Feel free to modify, sell or share as long as the digital file is kept free to all.

Both the raised and recessed versions are in the .3MF file.
I included a raised one set to be used with my AMS, a raised one in 1 color and a recessed one in 1 color.
You could printed the raised one with a filament change pause at the right layer if you don't have an AMS.
 

Check out this video if you want to learn how: